#include <stdio.h>

int main ()
{

    printf("      *      \n") ;
    printf("     ***     \n") ;
    printf("    *****    \n") ;
    printf("   *******   \n") ;
    printf("  *********  \n") ;
    printf(" *********** \n") ;
    printf("*************\n") ;
    printf(" *********** \n") ;
    printf("  *********  \n") ;
    printf("   *******   \n") ;
    printf("    *****    \n") ;
    printf("     ***     \n") ;
    printf("      *      \n") ;

    return 0 ;

}